Helena Valley Regulating Reservoir Weather Forecast
- 33
- 61
Chance Rain Showers
- 37
- 63
Partly Sunny
- 38
- 63
Chance Rain Showers
- 41
- 68
Chance Rain Showers
- 41
- 68
Rain Showers Likely
- 44
- 69
Chance Rain Showers
Today 20 May Helena Valley
Mostly cloudy. A 40 percent chance of rain Showers in the afternoon. Highs around 60. West Winds 10 to 20 Mph.
Tonight 20 May Helena Valley
Mostly clear. Lows in the mid 30s. Northwest Winds 10 to 15 Mph with Gusts to around 30 Mph shifting to the southwest after midnight.
Helena Valley Regulating Reservoir Temperature Statistics
May Temperature
Helena Regional Airport (5.6 miles)
Lowest 6 May, 2025
34.6 °FAverage May
56.1 °FHighest 10 May, 2025
88.6 °F
Climate (2020–Present)
Helena Regional Airport (5.6 miles)
Average Low 2020–2025
36.1 °FAverage 2020–2025
47.5 °FAverage High 2020–2025
59.3 °F